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► Med Misc 25 > Muscles of the Anterior Forearm > Flashcards

Muscles of the Anterior Forearm Flashcards

1
Q

What categories are the muscles of the anterior forearm split into?

A

Superficial, Intermediate, Deep

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2
Q

What do the muscles in the anterior compartment of the forearm do?

A

In general, produce flexion at the wrist and fingers, and pronation

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3
Q

What are the superficial muscles of the anterior forearm?

A

Flexor carpi ulnaris
Palmaris longus
Flexor carpi radialis
Pronator teres

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4
Q

What do all the muscles of the superficial compartment of the anterior forearm originate from?

A

A common tendon, which arises from the medial epicondyle of the humerus

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5
Q

What does the flexor carpi ulnaris have?

A

A humeral and ulnar head

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6
Q

What is the proximal attachment of the humeral head of the FCU?

A

Medial epicondyle of the humerus (common flexor origin)

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7
Q

What is the proximal attachment of the ulnar head of the FCU?

A

Olecranon and posterior border of ulna (via aponeurosis)

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8
Q

What is the distal attachment of the FCU?

A

Pisiform
Hook of hamate
5th metacarpal

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9
Q

What is the innervation of the FCU?

A

Ulnar nerve (C7, C8)

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10
Q

What % of the population is the palmaris longus absent in?

A

15%

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11
Q

What is the proximal attachment of the palmaris longus?

A

Medial epicondyle of the humerus (common flexor origin)

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12
Q

What is the distal attachment of the palmaris longus?

A

Distal half of the flexor retinaculum and apex of palmar aponeurosis

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13
Q

What is the innervation of the palmaris longus?

A

Median nerve (C7, C8)

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14
Q

What is the arterial supply of the palmaris longus?

A

Ulnar artery

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15
Q

What is the function of the palmaris longus?

A

Flexes hand at wrist

Tenses palmar aponeurosis

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16
Q

What is the proximal attachment of the flexor carpi radialis?

A

Medial epicondyle of the humerus (common flexor origin)

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17
Q

What is the distal attachment of the FCR?

A

Base of 2nd metacarpal

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18
Q

What is the innervation of the FCR?

A

Median nerve (C6, C7)

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19
Q

What is the arterial supply of the FCR?

A

Ulnar artery

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20
Q

What is the action of the FCR?

A

Flexes and abducts hand (at wrist)

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21
Q

What does the lateral border of the pronator teres form?

A

The medial border of the cubital fossa

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22
Q

What does the pronator teres have?

A

An ulnar head and a humeral head

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23
Q

What is the proximal attachment of the ulnar head of the pronator teres?

A

Coronoid process

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24
Q

What is the proximal attachment of the humeral head of the pronator teres?

A

Medial epicondyle of the humerus (common flexor origin)

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25
Q

What is the distal attachment of the pronator teres?

A

Middle of convexity of the lateral surface of the radius

26
Q

What is the innervation of the pronator teres?

A

Median nerve (C6, C7)

27
Q

What is the arterial supply of the pronator teres?

A

Ulnar artery

Anterior ulnar recurrent artery

28
Q

What is the main action of the pronator teres?

A

Pronates and flexes the forearm at the elbow

29
Q

What muscle is in the intermediate compartment of the anterior forearm?

A

Flexor digitorum superficialis

30
Q

Why is the flexor digitorum superficialis a good anatomical landmark?

A

The median nerve and ulnar artery pass between its two heads, and then travel posteriorly

31
Q

What does the FDS have?

A

Humero-ulnar head

Radial head

32
Q

What is the proximal attachment of the humero-ulnar head of the FDS?

A

Medial epicondyle (common flexor origin) and coronoid process

33
Q

What is the proximal attachment of the radial head of the FDS?

A

Superior half of anterior border of the radius

34
Q

What happens to the FDS at the wrist?

A

It splits into four tendons, which travel to through the carpal tunnel

35
Q

Where is the distal attachment of the FDS?

A

Shafts of the middle phalanges of medial four digits

36
Q

What is the innervation of the FDS?

A

Median nerve (C7, C8, T1)

37
Q

What is the arterial supply of the FDS?

A

Ulnar artery

38
Q

What is the main action of the FDS?

A

Flexes middle phalanges at proximal interphalangeal joints of middle four digits
Acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints

39
Q

What are the muscles of the deep anterior forearm?

A

Flexor digitorum profundus
Flexor pollicis longus
Pronator quadratus

40
Q

What does the flexor digitorum profundus have?

A

Medial part and lateral part

41
Q

What is the proximal attachment of the FDP?

A

Proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane

42
Q

What happens to the FDP at the wrist?

A

It splits into four tendons which pass through the carpal tunnel

43
Q

What is the distal attachment of the medial part of the FDP?

A

Bases of distal phalanges of 4th and 5th digits

44
Q

What is the distal attachment of the lateral part of the FDP?

A

Bases of the distal phalanges of the 2nd and 3rd digits

45
Q

What is the innervation of the medial part of the FDP?

A

Ulnar nerve (C8, T1)

46
Q

What is the innervation of the lateral part of the FDP?

A

Anterior interosseous nerve, from median nerve (C8, T1)

47
Q

What is the arterial supply for the FDP?

A

Ulnar artery

Anterior interosseous artery

48
Q

What is the main action of the medial part of the FDP?

A

Flexes distal phalanges 4 and 5 at the distal interphalangeal joints

49
Q

What is the main action of the lateral part of the FDP?

A

Flexes distal phalanges 2 and 3 at the distal phalangeal joints

50
Q

Where does the flexor pollicis longus lie?

A

Laterally to the FDP

51
Q

What is the proximal attachment of the FPL?

A

Anterior surface of the radius and adjacent interosseous membrane

52
Q

What is the distal attachment of the FPL?

A

Base of distal phalanx of the thumb

53
Q

What is the innervation of the FPL?

A

Anterior interosseous nerve, from median nerve (C8, T1)

54
Q

What is the arterial supply of the FPL?

A

Anterior interosseous artery

55
Q

What is the main action of the FPL?

A

Flexes phalanges of thumb

56
Q

What shape is the pronator quadratus?

A

Square

57
Q

Where is the pronator quadratus found?

A

Deep to the tendons of the FDP and FPL

58
Q

What is the proximal attachment of the pronator quadratus?

A

Distal quarter of anterior surface of ulna

59
Q

What is the distal attachment of the pronator quadratus?

A

Distal quarter of anterior surface of radius

60
Q

What is the innervation of the pronator quadratus?

A

Anterior interosseous nerve, from median nerve (C8, T1)

61
Q

What is the arterial supply of the pronator quadratus?

A

Anterior interosseous artery

62
Q

What is the main function of the pronator quadratus?

A

Pronate forearm

Deep fibres bind radius and ulna together

► Med Misc 25 (69 decks)

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